Black Cat (ブラックキャット, Burakku Kyatto?) is a Japanese Shōnen manga series written and illustrated by Kentaro Yabuki. It was originally serialized in Japan in Shueisha's Weekly Shōnen Jump. It was later collected in twenty tankōbon volumes from January 11, 2001 to October 9, 2004. The series was adapted into a twenty-four episode anime series by Gonzo studio. It debuted in Japan on the anime satellite television network Animax and the terrestrial Tokyo Broadcasting System network on October 6, 2005 with its final episode airing on March 30, 2006. The story centers on a man named Train Heartnet who withdrew from an elite group of assassins called the Chrono Numbers (時の番人, Kurono Nanbāzu?) to become a bounty hunter, or Sweeper.

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O anime é dividido em 24 episódios, de aproximadamente 25 min cada.